| 100% | INDELIBLE | 9 | Permanent ink that cannot be erased |
| 77% | INDELIBLE | 9 | Pen with ink that cannot be erased |
| 60% | INDELIBLE | 9 | Like pen marks that cannot be erased |
| 59% | INDELIBLE | 9 | Ink that can't be erased |
| 56% | INDELIBLE | 9 | Ink that is impossible to erase |
| 45% | TRESS | 5 | Lock that cannot be opened |
| 45% | SUNKCOST | 8 | Outlay that cannot be recovered |
| 45% | INCURABLE | 9 | Health condition that cannot be solved |
| 45% | ROOT | 4 | Tooth part that cannot be seen |
| 45% | ACE | 3 | Tennis serve that cannot be returned |
| 44% | ELEMENT | 7 | Chemical substance that cannot be broken down |
| 44% | DEADLETTERS | 11 | Mail that cannot be delivered or returned |
| 43% | MIRACLE | 7 | Event that cannot be explained by scientific laws |
| 43% | RUE | 3 | Feel regret over something that cannot be undone |
| 43% | SILENCE | 7 | Doctor Who aliens that cannot be remembered: the __ |
| 43% | ODDNUMBER | 9 | Uneven value that cannot be divided by 2 |
| 43% | READONLY | 8 | A protected file that cannot be changed or edited |
| 42% | YOUAWAKE | 8 | Question that cannot be answered if its answer is "no" |
| 42% | HYPOCRISY | 9 | “The only vice that cannot be forgiven,” per William Hazlitt |
| 41% | TIME | 4 | Something that cannot be stopped but once lost, cannot be brought back |
| 40% | GESTALT | 7 | Unified whole that cannot be described by the sum of its parts |
| 40% | TAT | 3 | Ink that might be on one's arm, for short |
| 39% | SCAR | 4 | Permanent mark that can be caused by chicken pox |
| 39% | INDELIBLE | 9 | Describes ink that can't be removed or altered |
| 39% | WISH | 4 | Crave something that cannot or probably will not happen |
| 39% | CARTRIDGE | 9 | Ink container that needs to be replaced |
| 38% | ERASABLE | 8 | Like ink that can be removed from the page |
| 37% | DEBTS | 5 | Amounts that are recorded in red ink |
| 37% | PERMANENT | 9 | Like markers that are hard to erase |
| 37% | INKS | 4 | Writing fluids that are usually hard to erase |